Martin Marietta is a leading American company that specializes in the production of construction materials and aerospace systems. Founded in 1993, it has grown through various mergers and acquisitions, including the notable merger with Lockheed Martin in 1995. The company operates in two main segments: Construction Materials and Aerospace. In the construction materials sector, Martin Marietta produces aggregates, cement, and ready-mixed concrete, serving infrastructure projects across the United States. The aerospace segment focuses on advanced technologies and systems for defense and space applications, contributing to national security and exploration efforts.